* post-expr-calls (`a.valueOr: ...`) don't count towards dot stacking
* prefer new line for lists etc if full line fits on RHS
* simple lhs of dot expressions can partially fill a line

Not used in nph

Previously we'd add a trailing comma only for complex lists - however,
when a simple list takes up multiple lines, the trailing comma is also
useful (similar to how `prettier` does it).

Incidentally, this also helps put a trailing comma in simple lists that
nonetheless only have one item per line.